I am using
gcc version 3.4.5 (Gentoo 3.4.5, ssp-3.4.5-1.0, pie-8.7.9)
on
Linux 2.6.15-gentoo-r1 #1 PREEMPT Tue Mar 21 18:53:15 CET 2006 Intel(R)
Pentium(R) M processor 1.60GH
Following code crashes gcc when compiled with
> gcc -O2 -msse2 -c test3.cpp
or
> gcc -O3 -msse2 -c test3.cpp
// --------------------------------
#include <emmintrin.h>
void foo(double* x, bool cond)
{
__m128d zero = _mm_setzero_pd();
_mm_store_sd(x, zero);
if (cond)
{
__m128d one = _mm_set_sd(1);
_mm_store_sd(x, one);
}
}
// --------------------------------
gcc output:
test3.cpp: In function `void foo(double*, bool)':
test3.cpp:15: error: unrecognizable insn:
(insn:HI 122 23 54 0 (set (reg:DF 79)
(vec_select:DF (reg:V2DF 63)
(parallel [
(const_int 0 [0x0])
]))) -1 (insn_list 23 (nil))
(expr_list:REG_DEAD (reg:V2DF 63)
(nil)))
test3.cpp:15: internal compiler error: in extract_insn, at recog.c:2083
The compilation works when using -O1 instead of -O2.
It does not matter what values the variables zero and one are set to,
as long as the values are different. Even following gives the crash:
#include <emmintrin.h>
void foo(double* x, bool cond)
{
__m128d zero;
_mm_store_sd(x, zero);
if (cond)
{
__m128d one;
_mm_store_sd(x, one);
}
}
--
Summary: ice with sse intrinsics (unrecognizable insn)
Product: gcc
Version: 3.4.5
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: gcc at povworld dot org
GCC host triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27353
